JPS6092206A - Hair treatment - Google Patents

Abstract

PURPOSE:A hair treatment, e.g. permanent waving agent, semipermanent setting agent or fixing agent for hairdressing, containing deoxyribonucleic acid or a salt thereof, and having improved waving effect and wave retaining effect. CONSTITUTION:A hair treatment, containing deoxyribonucleic acid or a salt thereof, e.g. Na or K salt, in an amount of 0.01-5.0wt%. The deoxyribonucleic acid or the salt thereof has cationic, anionic and nonionic sites in the molecule thereof and the property of bonding to the ionic sites of keratinous protein in the skin and adsorbing easily on the skin surface by the mutual action, and is capable of combing the hair by giving lubricity thereto and imparting a comfortable feeling. A sufficient effect is obtained even if the amount of an alkali agent, e.g. aqueous ammonia, is small, and therefore an uncomfortable odor is not smelt.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to hair treatment agents such as permanent waving agents, semi-permanent setting agents, and temporary setting agents. More specifically, the present invention particularly involves blending deoxyribonucleic acid or its salts into either or both of the first liquid for permanent waving, which has a mercapto compound as its main ingredient, and the second liquid, which has an oxidizing agent as its main ingredient. Permanent waving agent with excellent waving effect and wave holding ability, Semi-permanent set with excellent waving ability containing deoxyribonucleic acid or its salts 1 - Deoxyribonucleic acid or its salts as a hair cutting agent and fixing agent for hair styling This relates to a temporary setting agent with excellent setting power, which is formulated with the following.

Permanage 1 hair waving uses a reducing agent such as a mercapto compound, such as ammonium thioglycolate, as the main ingredient, and a first liquid containing ammonia or other alkali to reductively cleave the disulfide bonds between keratin molecules in the hair. , the hair is given the desired wave and then oxidized with a second liquid based on an oxidizing agent such as bromate, perborate, or hydrogen peroxide to reform the disulfide bonds and fix the wave. A bath method and a single bath method using only the first liquid have been widely used.

However, this method has the drawback that the waving does not last long enough, and if a waving agent is used too much to strengthen the waving, it may actually damage the hair itself. Therefore, an attempt has been reported to add a wave-fixing resin in the preparation of the first liquid to strengthen the wave force and sustainability, but in this method, the first liquid permeates into the hair due to - The reductive cleavage effect of the mercapto compound, which is the main ingredient, on the disulfide bonds between keratin molecules is not sufficiently performed. As a result, the waving effect on the hair and its sustainability are insufficient, and a satisfactory waving effect cannot be obtained.

The inventor of the present invention, as a result of intensive studies in order to eliminate the drawbacks seen in the use of conventional permanent waving agents as described above, has developed a first liquid for permanent waving that has a mercapto compound as its main ingredient and an oxidizing agent as its main ingredient. The present invention was achieved based on the perception that by incorporating deoxyribonucleic acid or its salts into one or both of the second liquids, the wave forming ability and its sustainability can be improved. .

In addition, semi-permanent setting agents have an inorganic reducing agent such as sulfite as their main ingredient, and are odorless and have little irritation to human skin. Ta.

The present invention provides deoxyribonucleic acid or its salts = 3
- By blending, it is possible to solve the problem of "defects" and provide a semi-permanent setting agent with excellent waving effect and waving holding power.

Further, the temporary setting agent is a hair styling fixing agent in which a polymeric compound is dissolved in a suitable solvent such as water, a lower alcohol, or a water-lower alcohol mixture, and provides temporary waves. It is also used to prevent hair from becoming unruly.

However, conventional polymeric compounds used as fixing agents for hair styling tend to cause flaking and blocking phenomenon under high temperature and high humidity conditions. Furthermore, cationic thread resins have the problem of skin irritation.

Therefore, the present invention solves the above-mentioned drawbacks by using deoxyribonucleic acid or its salts as a substitute for conventional polymeric compounds, and provides a temporary setting agent that has excellent setting power and is harmless to the human body.

That is, the gist of the present invention is a hair treatment agent characterized by containing deoxyribonucleic acid or a salt thereof.

-4- Hereinafter, the present invention will first be explained in the case of a permanent waving agent.The mercapto compound as the main agent that performs the reducing action of the first liquid is thioglycolic acid, its ammonium salt, monoethanolamine salt, cysteine, cysteine, etc. hydrochloride, etc., and 1.0 depending on the type of permanent wave treatment, cold method or heating method.
It is prepared in a range of 7.0% (weight %, the same applies hereinafter).

The first liquid contains pH regulators such as ammonia, caustic alkali, monoethanolamine, and jetanolamine, as well as adjuvants such as thiolactic acid, urea, effect enhancers such as rhodanammonium, and surfactants. , chelating agents, fragrances,
Hair nourishing agents such as glycerin, vitamin B6, pantothenic acid, and nicotinic acid amide may be added, all of which are listed in Ministry of Health and Welfare Public Notice No. 280 (June 1, 1962).
It is preferable to use a product that corresponds to the standard for permanent waving agents (day 0).

Next, specific examples of the oxidizing agent that forms the main ingredient of the second liquid include bromate, perborate, and hydrogen peroxide. Of course, various auxiliary agents similar to those for the first liquid may also be added.

In the present invention, when the hair treatment agent is a permanent waving agent, deoxyribonucleic acid or a salt thereof, such as a sodium salt or a potassium salt, is added to one or both of the first liquid and the second liquid at 0.00%. It is characterized by containing 01 to 5.0%. Deoxyribonucleic acid or its salts are high-molecular compounds containing an anionic phosphate site, a cationic birimidine or purine base site, and a nonionic sugar site within the molecule, and are similar to the ionic sites of the keratin protein in hair. It has a structure that easily adsorbs to the hair surface through ionic bonding or interaction. Unlike other synthetic polymers such as synthetic resins, proteins, and peptides, Zunari has a very close affinity with hair proteins. Therefore, when a permanent waving agent, for example, is added to the first liquid, deoxyribonucleic acid or its salts are adsorbed to the gaps in the hair epidermis that are formed when swollen hair is curled, and are condensed by the second liquid. The wavy shape that is formed is maintained for a long time.

When added to the second solution, deoxyribonucleic acid or its salts cause the aforementioned ionic bond with hair proteins, forming a thin film of organic polymer on the hair surface.

Therefore, the formed wave shape is maintained for a long period of time.

As described above, the present invention takes advantage of the fact that deoxyribonucleic acid or its salts have the property of easily bonding with the hair proteins of living organisms, and is incorporated into a hair treatment agent to maintain the waves applied to the hair for a long period of time. It can last for a long time, gives smoothness to the hair, makes it easier to comb, and gives a comfortable feel.

Moreover, in permanent waves, a sufficient waving effect can be obtained even with a small amount of alkaline agents used for waving, such as ammonia water, so the advantage is that there is no unpleasant odor for the practitioner or those around them during the treatment. There is. Further, even when deoxyribonucleic acid or its salts are added to a semi-permanent-7=setting agent whose main ingredient is an inorganic reducing agent such as sulfite, the sustainability of the wave can be improved. In addition, it is similarly effective as a substitute for synthetic or natural polymers such as resins and polymers, which are the main ingredients of temporary setting agents.

The amounts added to these semi-permanent setting agents and temporary setting agents are the same as those for the above-mentioned permanent waving agents.

Example 1 50% thioglycol ammonium oxide 12.0 (Jr 28% aqueous ammonia 2, Ogr cetyl alcohol 0.2 (lr polyoxyethylene cetyl ether 0.5 Or sodium lauryl sulfate 0.1 + lr deoxyribonucleic acid 0
．． A first liquid for permanent waving of the present invention was prepared by dissolving 20r or more in purified water to make a total amount of 1001ni. This is called liquid A. In addition, as a control solution, 50% ammonium thioglycolate-8-12, Ogr 28% aqueous ammonia 2.0! lr cetyl alcohol 0.2111r polyoxyethylene cetyl ether 0.5or sodium lauryl sulfate o, ior The above were dissolved in purified water to make a total volume of 100IIl to prepare a first liquid for permanent wave. This is referred to as Aa liquid.

Example 2 Sodium bromate 6.0or Liquid paraffin 1.0or Polyoxyethylene oil ether 0.3(lr Sorbitan trioleate 0.2(lr Sodium deoxyribonucleate 0.5or or more) was dissolved in purified water and the total amount was reduced to 100Illi A second liquid for permanent waving of the present invention was prepared.This is called liquid B.As a control, sodium bromate 6.0gr liquid paraffin 1.0or polyoxyethylene oil ether 0.3+1lr-
9- Sorbitan trioleate 0.29r or more was dissolved in purified water to make a total volume of 10011r to prepare a second liquid for permanent wave. This is referred to as [3a solution].

□Example 3 First liquid A1 and second liquid B1 for permanent waves prepared according to Examples 1 and 2 and the first control liquid
A wave test was conducted using a combination of liquid Aa and second liquid Ba, and the results shown in Table 3 were obtained.

Note that the wave effect (%) and wave retention rate (%) in the wave test were measured by the following method.

(1) Measurement of waving effect; - The hair of a woman who has not undergone chemical treatments such as permanent waving or hair dye was thoroughly washed with a 2% sodium lauryl sulfate aqueous solution for 5 to 10 minutes, rinsed with water, and then heated to a relative humidity of 50%. , and stored in an atmosphere at a temperature of 20° C. to prepare test hair. Next, on an acrylic resin plate with a length of 50 mm and a width of 10 IIll, 7 pieces were placed in two rows parallel to each other at equal intervals.
Hold up a book pin, -10- Make a bundle of 30 hairs prepared earlier, wrap them in a zigzag pattern alternately in two rows of bottles, and add 30 strands of hair to the first solution (AlAa).
After being immersed at 7° C. for 10 minutes, it is washed with water for 30 seconds, and after being immersed in the second liquid for 15 minutes, it is washed again with running water for 30 seconds. Kilby's method (Proceedings of Treatment) was used to evaluate the wavy effect of hair immediately after treatment and the wavy effect after hanging the hair in a room with constant humidity (temperature 20 degrees Celsius and relative humidity 50%) for one day. The Scientific
Section Vol. 26, p. 12, 1965),
It was determined by the following formula.

(2) Wave retention rate (%) -11- Table 2-12- As is clear from the results in Table 2, deoxyribonucleic acid or It was found that the examples in which the salts were blended were superior in wave effect and wave holding power compared to the control examples in which the salts were not blended.

Example 4 Sodium bisulfite io, oor monoethanolamine 10. Ogr Deoxyribonucleic acid 1.0or Polyoxyethylene sorbitan monooleate 1.0o
When the Abe retention power was examined, it was found to be excellent.

Example 5 First agent component Sodium sulfite 5.0ar Ammonium thioglycolate 1.0or-13- Sodium carbonate 2.0or Polyoxyethylene castor oil 0.5or Second agent component Sodium deoxyribonucleic acid 2.0or Polyoxyethylene lanolin 0 The 1st and 2nd cutting ingredients of .5gr or more were each dissolved in purified water.[The holding power was also good.

Example 6 Sodium deoxyribonucleic acid 2.0 or polyoxyethylene lanolin 1.0 or ditanol 30.0 ur Iriserin 2.0 or Agent Patent attorney Tsutomu Adachi and 1 other person -14-

Claims (1)

[Scope of Claims] 1. A hair treatment agent characterized by containing deoxyribonucleic acid or a salt thereof. 2 Deoxyribonucleic acid or its salts are 0.01 to 5.
The hair treatment agent according to claim 1, which contains 0% by weight.